Question

 Now satellites are helping to forecast(预报) the weather. They are in space，and they can reach any part of the world. The satellites take pictures of the atmosphere(大气层)，because this is where the weather forms. They send these pictures to the weather station. So the scientists there can see the weather of any part of the world and tell how the weather will change.

  Today, nearly five hundred weather stations in sixty countries can receive satellite pictures. When they receive new pictures，they compare them with the earlier ones. They may find that the clouds have changed during the last few hours. This may mean that the weather on the ground may soon change, too. In the next weather forecast, they can tell people about it.

  So the weather satellites offer great help for the scientists at the stations. In the past, they could forecast the weather about 24 or 48 hours earlier. Now they can make good forecasts for 3 or 5 days. Soon,perhaps, they may be able to forecast the weather for a week or more ahead(提前）.

根据短文内容，选择最佳答案。

(   ) 1. The weather forms      

A.    in any part of the world

B.    in the atmosphere

C.    in space

D.    on the ground

(   ) 2. Changing clouds in the atmosphere means      

A.   it is a rainy day

B.   it is a windy day

C.   the weather will change

D.   it is a sunny day

(   ) 3. Without satellites，scientists could forecast the weather for       ahead.

A.   a week or more

B.   1 or 2 days

C.   2 or 5 days

D.   two weeks

(   ) 4. What does the underlined word"compare"mean in Chinese?
A.与……相似    B.将……比作
C.交换        D.对比

(   ) 5. Which of the following is TRUE according to the passage？

A.   The satellites take pictures of the weather station.

B.   The weather forecast is quite exact.

C.   The weather satellites are now used in weather forecasting.

D.   Now the satellites can forecast the weather for a week.

Answer 1

1.B  由第一段第三句可知，天气是在大气层中形成的。

2. C

3. B由第三段第二句可知在过去没有人造卫星时，科学家只能提前预报一到两天的天气。

4. D 

5.C